Sound amplifier



FIG. 1 is a front elevation view of a sound amplifier, embodying my new design.

FIG. 2 is a front perspective view thereof.

FIG. 3 is a rear elevation view of said sound amplifier with electrical input devices according to the new design; and,

FIG. 4 is a rear perspective view thereof.

The broken lines shown are included for the purpose of illustrating portions of the sound amplifer that form no part of the claim. 

CLAIM I claim the ornamental design for a sound amplifier, as shown and described. 